Sky Nations is a multiplayer sandbox game where players can join together to build air ships(cannons and all!) and do battle across a vast world procedural world full of relics and machines from another age waiting to be plundered by daring sky captains and their motley crew.
A development shot of how ship power works. Currently it works similar to a mana pool in RPGs. With certain blocks enlarging the pool and machines and generators contributing to regeneration/degeneration of it.